What are the solutions to the equation 3x^2-21=0 ?

The solutions to the equation 3x^2-21=0 are x=sqrt(7),x=-sqrt(7)

Find the zeros of 3x^2-21=0

The zeros of 3x^2-21=0 are x=sqrt(7),x=-sqrt(7)

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3 x^{2} - 21 = 0

x = 7, x = - 7

Decimal Notation

x = 2.64575 \dots, x = - 2.64575 \dots

Solution steps

3 x^{2} - 21 = 0

Move

21

to the right side

3 x^{2} = 21

Divide both sides by

3

x^{2} = 7

For

x^{2} = f (a)

the solutions are

x = f (a), - f (a)

x = 7, x = - 7

x^{4} + 15 x^{2} - 16

- 3 - 6 (4 x + 6) > - 111

27 x^{5} - 54 x^{4} + 15 x^{3}

e^{- i}

What are the solutions to the equation 3x^2-21=0 ?
The solutions to the equation 3x^2-21=0 are x=sqrt(7),x=-sqrt(7)
Find the zeros of 3x^2-21=0
The zeros of 3x^2-21=0 are x=sqrt(7),x=-sqrt(7)